I used mechs and single voltage mods way back when I started vaping. I much prefer regulated and temperature control now. I do still have a number of mechs that are still useable, a Rough stack for example..

I don't have a mech mod and never tried one, but...
There's just something in them that fascinates me. Even though I'm a tech guy and data freak, the simplicity and the looks of mechs are alluring.
Was watching some reviews of Chillum Tantra and it's straight up mod porn. No other way to call it. Simple, effective and killer looks.
Only problem is that I'll never be able to afford something like that, haha!

I used battery ecigs my first couple years vaping, and have used mech mods ever since, with the Galileo being my mainstay for the last year or so. I also use the Gripper when I want to vape less conspicuously. I mainly use mech mods because they're durable, can take multiple types of batteries (the telescope kind) and are pretty inexpensive. But I wouldn't mind trying something new.

I have one mechanical and one kayfun. I wanted and needed to know how to use these. I don't use them often. I use vision spinners and smok VVs. I've not been able to buy anything else yet. I don't know if the spinners and smoks are considered regulated or not? But I use them every day.

I started with regulated devices, and have graduated to "MOAR POWER" over the past 18-19 months. I have acquired a few mech mods, just to be in a position of preparedness. I was using one of those mechs last evening, and maybe because it was new, maybe because I'd loaded a fresh coil, but it was an INCREDIBLY SMOOTH vape experience.

I don't build micro-ohm coils (0.5-1.5 is my range), but I am REALLY careful to watch which battery is getting used with which coil, even in a regulated mod.

In my grand scheme of vaping, I think I still prefer the regulated devices. The hit is the same from a fully-charged battery to an almost-dead battery.